/*
 * Copyright © 2019 wkang. All rights reserved.
 */

package main

import "fmt"

func add(x int, y int) int {
	return x + y
}

func sub(x, y int) (z int) {
	z = x - y
	return
}

func fir(x int, _ int) int {
	return x
}

func zero(int, int) int {
	return 0
}

func main() {
	fmt.Printf("%T\n", add)
	fmt.Printf("%T\n", sub)
	fmt.Printf("%T\n", fir)
	fmt.Printf("%T\n", zero)

}
